PR changes for isinstance() function markdown

content/python/concepts/built-in-functions/terms/isinstance/isinstance.md

@@ -0,0 +1,48 @@
+---
+Title: 'isinstance()'
+Description: 'Returns True if the given object is the specified type. Otherwise the function will return False.'
+Subjects:
+  - 'Data Science'
+  - 'Computer Science'
+Tags:
+  - 'Booleans'
+  - 'Data Types'
+  - 'Development'
+CatalogContent:
+  - 'learn-python-3'
+  - 'paths/computer-science'
+---
+
+The **`isinstance()`** function determines whether a given object is of a designated value type. If it is, the function will return `True`, otherwise the function will return `False`.
+
+## Syntax
+
+```pseudo
+isinstance(object, class)
+```
+
+- `object` is the object, or a reference to the object, to be tested.
+- `class` is the type the function will use in this assertion (e.g. list, set, etc.).
+
+## Example
+
+```py
+var1 = "Hello World!"
+var2 = 123
+
+def check_if_string(value):
+    if isinstance(value, str):
+        print(f'{value} is a string type.')
+    else:
+        print(f'{value} is not a string.')
+
+check_if_string(var1)
+check_if_string(var2)
+```
+
+This example results in the following output:
+
+```shell
+Hello World! is a string type.
+123 is not a string.
+```